xxii Proceedings. [April 20th, iQog>. 



Thorp, F.R.A.S. ; Ernest Rutherford, F.R.S. ; F. W. 

 Gamble, D.Sc, F.R.S. 



Secretaries: R. L. Taylor, F.C.S., F.I.C. ; C. Gordon 

 Hewitt, iM.Sc. 



Treasurer: Arthuu McDougall, B.Sc. 



Librarian: C. L. Barnes, M.A. 



Other Metnbers of the Coiuicil : Francis Nicholson, F.Z.S. ; 

 Ernest F. Lange, F.C.S., M.I.Mech.E. ; Horace Lame, M.A., 

 LL.D., D.Sc, ScD., F.R.S. ; W. H. Todd ; Arthur Schuster, 

 Sc.D., Ph.D., F.R.S. ; Edmund Knecht, Ph.D. 



Ordinary Meeting, April 20th, 1909. 



Professor H. B. Dixon, M.A., F.R.S., President, in the Chair. 



The thanks of the members were voted to the donors of the 

 books upon the table. 



Mr. W. S. Ascoli, F.R.G.S., read a paper, communicated 

 by Mr. C E. Stromeyer, M.Inst.C.E., entitled "The Guate- 

 malan Earthquakes and Eruption of 1902." The 



Itcture is published in a condensed form in the Memoirs. 



At this point the chair was occupied by Mr. Francis Jos'es, 

 M.Sc, F.R.S.E. 



Mr. F. H. Gravely, M.Sc, read a paper entitled "Apical 

 Pigment-Spots in the Pluteus of Echinus miiiaris" of 

 which the following is an abstract. 



In advanced living plutei of Echinus viiliaris from the 

 plankton of Port Erin Bay, there are present in close associa- 

 tion with the apical plate two pairs of pigment-spots, and one 

 pair of tufts of stiff cilia. The anterior pair of pigment-spots are 

 small and of a transparent red colour. The posterior pair are 

 larger, and of an opaque yellow. They are situated in the 



